Malicious PDF — malware analysis report

Static analysis result for SHA-256 392d57509e3a0465…

MALICIOUS

PDF

73.0 KB Created: 2021-09-03 23:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: bc32ae35eb2817820c813a0e01ce9dec SHA-1: 2d4129af68cdd8864deef20f68a5486244742b25 SHA-256: 392d57509e3a04652f5639784cd0672a7a95f5ae7ecc9afafd5e897353dc3256
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b38fe5e8613---rakobup.pdf In PDF document text
    • https://nestaerospace.com/uploads/file/34823709308.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/rivilibabadozuzudamaxatax.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/kegon.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/gedewugutofepij.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa3c91f91---28748880100.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/genixatefilewowevotadawil.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/xamidizeziz.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/faxefif.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/5bcfab776246c96455b4263ffc27f06e/piwetanewopop.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/nimug.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/ledefubokavirujogigab.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bd722144f35f0b42e61f83e703132022/fofixufumogijefikibaz.pdfIn PDF document text
    • http://airfa.it/userfiles/file/31304967511.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/016aa5569ade9fe321411d7749c29e74/jofenitasesonafa.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/37151431808.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/semoxineguxizajinosisob.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/xigibunasefopom.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/f8c9dc0379739137335751ee368ce1a4/sosokorupegepikurezi.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/nipatu.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/panevemasi.pdfIn PDF document text
    • https://digireg.nu/upload/kafiwak.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/2pv88m19h800upk7fjt81pnvgu/vevijufodopigebamubupa.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///16500342725.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=.net+c+sharp+tutorials+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD485 10788 bytes
SHA-256: d177fa3265b025764f70f163c57720fbb74cccd1bf2f52f98ab99d1a8fa983f9
font_02_sfnt_off0000ed3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 16348 bytes
SHA-256: cf984295cefaabc6a3662b626a09fc6c9309a5f751e44fa663c2056d6a0b6a4b

Open this report in the interactive analyzer, or submit your own file for analysis.